How many four-digit numbers divide by 5 ? Note:0001 is considered a 1-digit number .

Answer 1

so the smallest is 0001 and the largest is 9995

or from 1 to 9998 is 9995 numbers, every 5th one would be a multiple of 5
9995/5 = 1999

Answer 2

How many three-digit numbers are even ?